I have had a robot vacuum cleaner for about a year now. This model is inexpensive, but not bad. It is reliable and quite powerful. It does not crash into objects and walls, sometimes it touches, but slightly. App control. In conclusion, I want to say that the iRobot Roomba e5 robot vacuum cleaner does not have modern bells and whistles, but it does a good job of cleaning. And for me this is the main thing.